SOSUS, or the Sound Surveillance System, is an underwater acoustic monitoring system used primarily by the United States Navy. Developed during the Cold War, SOSUS is designed to detect and track submarines and other underwater objects through the analysis of sound waves. The system employs an array of underwater microphones (hydrophones) that are positioned along the ocean floor, typically at key chokepoints or along naval routes. The hydrophones pick up sounds from submarines, including engine noise and other operational sounds.
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